Wow. I'd have a hard time paying that much for a single-band all-mode radio when you can pay about the same for an all-band all-mode radio. ymmv.
There are a few ways to think about single band radios. I prefer single band radios myself, but have both, single banders and DC-to-daylight rigs.
If you use single band radios and a single radio dies you are only down on one band. Use something like the Kenwood TS-2000x (I have two, one on the desk and one in my Bronco) and if the radio fails you are off the air...period. Of course, without a radio like the TS2Kx it is very unlikely I would have HF/6M/2M/70cm/23cm/Wideband RX all in my Bronco. Would I really bother if I had to have 5 or 6 rigs in there instead of one rig and a single control head?
Single band radios, particularly good ones like the 275H, tend to be better in several performance criteria than an "all-in-one". My TS-2000x is good, possibly the best single bang-for-buck value radio to be had today, it does everything at least to an OK level, but it does not compete with a good HF only rig on HF, or the 275H on 2M, or the 475H on 70cm, or the 575H on 10M/6M. Of course, none of those radios is going to cross band whatever they are on to my 70cm HT either, but the TS2K does that exceedingly well, it is the primary reason I have one on the desk.
Single band radios allow you to work and watch everything at once. You can park on the calling freq for the band or scan the band without missing the same kind of stuff on the other bands. You are more likely to make that contact.
T!
Mohave Desert, California, USA